Automatic brake i oe



Mar. 20, 1923. 1,448,977

J. PERLIN AUTOMATIC BRAKE FOR MOTOR'VEHICLES v Filed Dec. 6, 1920 Z3 l Www/v.

A TTHNEYS Patented Mar. 20, 1923.

PATENT OFFICE.

JACOB PERLIN, F CHICAGO, ILLlINOIS.

AUTOMATIC BRAKE FQIL .MUFOR VEHICLES.

Application filed Beceniber 6, 1920.

To all 'lolz/0m 'it may concern.

lle it known that l, Jason PERLIN, a citizen oit Russia, and a resident of the city ot Chicago, in the county of Cook and State ot illinois, have invented a new and useful improvement in Automatic Brakes :tor Motor Vehicles, of which the following is a full, clear, and exact description.

My invention relates to improvements in brakes tor motor vvehicles and more particularly to an automatic safety brake iior automobiles, trucks and the like, and it consists in the combinations, constructions and arrangements herein described and claimed.

An object of my invention is to provide an automobile braking device which will automatically bring the car to a stop when it strikes an obstacle.

A further object ot my invention is to provide a device oi the type described which has a novel and automatic means for placing antieskid members underneath the rear wheels of an automobile when it has struck an obstacle.

A :turther object of my invention is to provide a device of the type described which has a novel bumper mechanism that automatically operates the braking mechanism of the device.

A further object ot my invention is to provide a device of the type described which is simple in construction and operation, is strong, light and durable, has 'lew moving parts, and is therefore not likely to easily get out of order.

A further object of my invention is to provide a device of the type described which can be easily attached to any car without altering the construction of the latter.

Other objects and advantages will appear in the following speciiication, and the novel features of' the device, will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanving drawing, forming a part ci this application, in which-w Figure l is a side elevation of an antonio bile, showing the device attached,

Figure 2 is a side elevation of the device as shown attached to the frame oit an automobile,

Figure 3 is a top plan view oi the device as shown attached to the frame of an auto? mobile,

Serial No. 428,741.

Figure t is a perspective view of a nortion of the device and A Figure 5 is an enlarged view partly in section of a part of a mechanism illustrated an Figure 2.

ln carrying out my invention, l make use of the ordinary automobile comprising a frame l which is mounted on wheels 2. i

Secured to the side channelirons 3 and 4 oit the frame l are a plurality of depending supports 5 which are adapted to rotatably carry two rods 6 and 7. Each ot the rods 6 and 7 has secured thereto a pair ot arms 8-8 and 9-9 respectively which carry rods l() and ll (see Figure 3). It will be noticed in Figure 3 that the rod 1l is longer than the rod l() and has its ends l2 slidably disposed in guide members 13 which are secured to plates la. The rod 10 is also slidably disposed in guide members l5 which are secured to the inner sides ot the plates la. When the arms 8-8 and 9-9 are in alinement with the supports 5, the plates lll are adapted to rest on the ground (see Figure 2). This movement ot the arms relative to the plates lll, allows the rear wheels 2 of the car to run up on the plates le. Springs 18 are disposed on each of the rods 6 and 7 and are adapted to engage the arms 8-8 and 9-9 so as to bring them into alinement with the supports 5.

In order to keep the plates la up under the running boards oi the car', as shown in Figures l and 2, I secure one end of a cable 18, to the rod l1, while its other end is secured to a pulley i9 which is mounted on a stub shalt 2O jcurnaled in the channel iron 4. The end of the shalt 20 is squared and is adapted to receive a crank (not shown) with which it is rotated.

ln place ci the ordinary automobile bumper l make use ci.t a rod 21 which is rotatably mounted in the trame l (see Figure 3). Two arms 22ers secured to the rod 2l and pivotally carry at their free ends, sleeves 23. lt will be observed that chains 2li are fastened to the sleeves and to the radiator of the car, having springs 25 disposed intermediate their lengths so as to ailord a resilient or yieldable carrying means 'for the sleeves. the sleeves 23 and takes the place ot the ordinary car bumper.

The cable 18 carries a hook 27 (see Fig- AL rod 26 is fastened to ure 3) that is adapted to engage a hook 28, which is carried by the rod 21. When the plates 14 are raised u underneath the running boards the hoo 28 can engage the hook 27, thus holding the plates 14 up in position. If the car should strike an obstacle ot' any kind, the rod 26 would be pushed down into the dotted line position shown in Figure 2, causing the arms to rotate the rod 21, thus releasing the hook 28 from the hook 27 which allows the plates 14 to drop beneath the rear wheels of the car. The bottoms of the plates 14 are ribbed so as to further facilitatethe stopping of the car (See Figure 4).

I also provide an extension bumper 29 .which has its rods 30 slidably disposed in the sleeves 23. It will be observed that when the bumper 29 is in the position as illustrated in the fulllines yof Figure 1, the ends of the rods 30 which are slidably disposed in the sleeves 23, engage the ends of the arms 22. If the bumper 29 .strikes an obstacle, the rods 30 will swing the arms l22 to the dotted line position ,of Figure v5 which releases the -retaining hook y28. The rods 30 will thereupon be lfreed from the ends of the arms 22 and will slide in the sleeves 23 (see dotted line position ,in Figure 2).

From the foregoing descri, tion of the various parts of the device, t e `operation thereofI may be readily understood. When the rod 26, which acts as the cars bumper, strikes an obstacle, it forces the arms 22 down into the dotted osition shown in Figure 2, rotates the ro 21, releases the hook 28 from the hook 27 which allows the springs 18 to actuate the arms 8-8 and 9-9 and thus to carry the plates 14 from beneath the running boards to the ground. The momentum of the car carries ,the rear Wheels 2 of the car on to the plates 14 While the rods 10 and 11, which lare carried by the arms 8 8 and 9 9 respectively, slide in the guide members 13 and 15. Before .the rods 10 and 11 reach the end of the guide members 13 and 1,5,.t-he chains 16 become taut and prevent any further movement of the plates 14 relative the car. It is obvious that the Wheelsl will revolve on the smooth plate 14 until the clutch of the car is released. The ribbed bottoms of the plates 1.4 dig into the ground and soon bring the ear to a stop.

In order to bring the plates 14 baek to their normal position, which is underneath the running boardsthe ear llas to be backed up until the rear wheels l'ree the plates 14 so that? the plates can be raised b v the winding of the cable 18 around the pulle)v libt until the hook 27 can be engaged b v the hook 28. It will be noticed that the guide members 13 and 15 have notches at one ot their ends which are adapted to receive the rods 10 and 11 respectively. This prevents any movement of the plates 14 relative the rods 10 and 11 when the plates are olf oll the ground since the weight of the plates keep them in the notches. As soon as the plates strike the ground, however, the rod.: T

10 and 11 are released from their respectiv.l notchles and are thus permitted to slide along the guide members 13 and 15.

As will be seen in liigure 3, l provid" a strap 31 which is wound zigzag between the two arms 22 so as to carry the one who has been struck.

I claim:

1. The combination with a motor vehicle having drive wheels. of plates `arranged to be interposed between said drive Wheels and the ground, said plates having transverse ridges on the bottoms thereof, and upwardly extending slide members on the upper surfaces, said slide members heilig provided with longitudinal slots adapted to permit a supporting arm to operate and engage therewit 2. As an article of manufacture a brake plate, said plate having a plurality of spaced apart transverse ridges on the bottom thereof and integral upwardly extendingr slide members on the upper surface thereof, said slide members having slots therethrough adapted to pivotally and slidablv receive a supporting member whereby said plates may be pivotally and slidably supported on the supporting arm.

JACOB PERLIN. 

